Apple have define an IOCTL (since Tiger) called IOSSIOSPEED which
facilitates non-standard baud rates.
They publish a C example which explains it:
http://developer.apple.com/library/mac/#samplecode/SerialPortSample/Introduction/Intro.html
Attached is a patch for FPC's darwin RTL which adds this IOCTL.
I think it's correct (i.e. it evaluates to the same value, 0x80045402,
as some C I threw together using Apple's headers, see attached).
I've appended this definition in termios.inc as this seems the most
appropriate place for it. Jonas?
Cheers, Bruce.
*** a/rtl/darwin/termios.inc Mon Aug 15 15:05:10 2011
--- b/rtl/darwin/termios.inc Mon Aug 15 15:05:10 2011
***************
*** 601,605 ****
--- 601,609 ----
FIOGETOWN = (IOC_OUT or (sizeof(cint) and IOCPARM_MASK) << 16) or ((ord('f') << 8) or 123);
FIODTYPE = (IOC_OUT or (sizeof(cint) and IOCPARM_MASK) << 16) or ((ord('f') << 8) or 122);
+ // from /System/Library/Frameworks/IOKit.framework/Versions/A/Headers/serial/ioss.h
+
+ FIOSSIOSPEED = (IOC_IN or (sizeof(culong) and IOCPARM_MASK) << 16) or ((ord('T') << 8) or 2);
+
{$endif}
#include <stdio.h>
#define IOCPARM_MASK 0x1fff /* parameter length, at most 13 bits */
#define IOC_IN (unsigned long)0x80000000
#define _IOC(inout,group,num,len) \
(inout | ((len & IOCPARM_MASK) << 16) | ((group) << 8) | (num))
#define _IOW(g,n,t) _IOC(IOC_IN, (g), (n), sizeof(t))
#define IOSSIOSPEED _IOW('T', 2, speed_t)
typedef unsigned long speed_t;
int main()
{
printf("IOSSIOSPEED = 0x%x\n",IOSSIOSPEED);
return 0;
}
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